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From 332ec67718959920c26283854ec9280e4023a437 Mon Sep 17 00:00:00 2001
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From: Robert Marshall <rmarshall@redhat.com>
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Date: Mon, 6 Mar 2017 15:57:54 -0500
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Subject: [PATCH] Fix initial saved_entry read issue (#1285601)
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If a system has never had a kernel upgrade/rollback then grubby
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does not read saved_entry properly. Added a guard to catch
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saved_entry and read it to pick the proper index in these cases.
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Resolves: rhbz#1285601
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---
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grubby.c | 29 +++++++++++++++++++++++++++--
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1 file changed, 27 insertions(+), 2 deletions(-)
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diff --git a/grubby.c b/grubby.c
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index de76b56..4d3834b 100644
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--- a/grubby.c
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+++ b/grubby.c
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@@ -2620,6 +2620,9 @@ void setDefaultImage(struct grubConfig *config, int isAddingBootEntry,
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struct singleEntry *bootEntry, *newDefault;
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int indexToVerify, firstKernelEntryIndex, currentLookupIndex;
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+ /* initialize */
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+ currentLookupIndex = FIRST_ENTRY_INDEX;
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+
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/* handle the two cases where the user explictly picks the default
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* boot entry index as it would exist post-modification */
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@@ -2685,8 +2688,30 @@ void setDefaultImage(struct grubConfig *config, int isAddingBootEntry,
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config->defaultImage++;
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}
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} else {
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- /* use pre-existing default entry */
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- currentLookupIndex = config->defaultImage;
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+ /* check to see if the default is stored in the environment */
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+ if (config->defaultImage < FIRST_ENTRY_INDEX) {
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+ if (config->defaultImage == DEFAULT_SAVED || config->defaultImage == DEFAULT_SAVED_GRUB2)
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+ {
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+ if (config->cfi->defaultIsSaved) {
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+ if (config->cfi->getEnv) {
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+ char *defaultTitle = config->cfi->getEnv(config->cfi, "saved_entry");
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+
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+ if (defaultTitle) {
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+ if (isnumber(defaultTitle)) {
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+ currentLookupIndex = atoi(defaultTitle);
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+ } else {
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+ findEntryByTitle(config, defaultTitle, ¤tLookupIndex);
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+ }
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+ /* set the default Image to an actual index */
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+ config->defaultImage = currentLookupIndex;
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+ }
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+ }
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+ }
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+ }
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+ } else {
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+ /* use pre-existing default entry from the file*/
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+ currentLookupIndex = config->defaultImage;
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+ }
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if (isAddingBootEntry
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&& (newBootEntryIndex <= config->defaultImage)) {
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--
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2.9.3
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